# Graph window external data file (*.csv)¶

Graph window external data file contains the data to be displayed on graph windows. List 20 shows an example of graph window external data file.

List 20 Example of graph window external data file
X,Elevation,Depth
0,120,5.12
30,140,7.2,1
35,120,8.12
42,140,9.2,4


Graph window external data file must have a header line. The header line defines the data contained in each column. The header line has to stick to the following rules:

• First column must be “X” (the x-axis values on the graph). The following column names are arbitrary.
• Columns names must consist of only alphabets and numbers.

On the second line and the following lines, the X values and Y values are stored. The values have to be real numbers.